Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Inkjet head and inkjet printer

a technology of inkjet printer and inkjet head, which is applied in the direction of printing and inking apparatus, etc., can solve the problems of deformation of another portion of the sheet, ink may be ejected from the nozzle, and structural cross-talk, etc., and achieve the effect of suppressing structural cross-talk and suppressing deformation in the piezoelectric sh

Active Publication Date: 2007-04-03
BROTHER KOGYO KK
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an inkjet head that suppresses structural cross-talk occurring when the volume of pressure chambers adjacent to the target pressure chamber changes accidentally, by suppressing deformation in the piezoelectric sheet at not-opposing areas which does not face the pressure chambers. The invention also provides an inkjet printer having the inkjet head. The technical effect is to improve the accuracy and stability of inkjet printing.

Problems solved by technology

As the density of pressure chambers continues to increase in this type of inkjet head in recent years in order to meet high resolution and high-speed printing needs, a problem called structural cross-talk has arisen.
The structural cross-talk means that deformation in the piezoelectric sheet facing a certain pressure chamber accidentally results in deforming another portion of the sheet facing adjacent pressure chambers.
As a result, ink may be ejected from nozzles where such ejection is not intended.
Accordingly, the amount of ink ejected from this pressure chamber is not stable.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inkjet head and inkjet printer
  • Inkjet head and inkjet printer
  • Inkjet head and inkjet printer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027]An inkjet head according to a first embodiment of the present invention will be described next. It should be noted that the direction expressions such as “front”, “rear”, “above”, “below”, “top”, and “bottom” are used throughout the description to define the various parts when a printer is disposed in an orientation in which it is intended to be used. The inkjet head according to a first embodiment of the present invention is provided in an inkjet printer (not shown) for ejecting ink onto a paper conveyed in the inkjet printer in order to record images on the paper.

[0028]FIGS. 1 and 2 show the inkjet head 1 having a main head member 70 for ejecting ink to paper and a base block 71. The main head member 70 has a flat rectangular shape extending in a main scanning direction. The base block 71 has two ink reservoirs 3 for supplying ink to the main head member 70. The two ink reservoirs 3 are positioned above the main head member 70.

[0029]The main head member 70 includes: a channe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An inkjet head in which cross-talk between adjacent pressure chambers is suppressed. The inkjet head has a channel unit having pressure chambers and nozzles communication with the pressure chambers, and an actuator unit fixed to one surface of the channel unit for changing the volume of the pressure chamber. The actuator unit includes individual electrodes provided opposed to the plurality of pressure chambers for receiving a drive signal to change the volume of the pressure chamber; a common electrode provided over the plurality of pressure chambers; a piezoelectric sheet provided between the individual electrode and the common electrode; and an independent electrode provided between adjacent individual electrodes and electrically isolated from the common electrode and the individual electrodes. An inductor is electrically connected between the independent electrode and a portion whose electric potential is substantially the same as that of the common electrode.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an inkjet head for ejecting ink onto a recording medium and an inkjet printer for performing printing operations with the inkjet head.[0003]2. Description of the Related Art[0004]An inkjet head distributes ink supplied from an ink tank to a plurality of pressure chambers to eject ink through nozzles that are in fluid communication with the pressure chambers by selectively applying pressure in pulses to the pressure chambers one of methods for selectively applying pressure to the pressure chambers is to use an actuator unit formed of a plurality of ceramic piezoelectric sheets laminated together.[0005]One inkjet head having this type of actuator unit is disclosed in Japanese unexamined patent application publication HEI-4-341852 (FIG. 1). The inkjet head has a plurality of individual electrodes disposed opposite a plurality of pressure chambers for changing the volume of the pressure cham...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(United States)
IPC IPC(8): B41J2/045B41J2/055B41J2/14
CPCB41J2/14209B41J2002/14217B41J2002/14225B41J2002/14306B41J2002/14459B41J2002/14491B41J2202/20
Inventor IWAO, NAOTO
Owner BROTHER KOGYO KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com